椎基底动脉系统短暂性脑缺血发作的临床和MRI分析  

A clinical and MRI study of vertebrobasilar transient ischemic attacks

作　　者：沈扬[1] 王继琛[1] 李美琳[1] 蒋学祥[1] 

机构地区：[1]北京医科大学第三附属医院神经内科,北京医科大学第一附属医院放射科

出　　处：《北京医学》1996年第4期195-198,共4页Beijing Medical Journal

摘　　要：对６８例椎基底动脉系统短暂性脑缺血发作（ＴＩＡｓ）进行了ＭＲＩ检查，其中１８例（２６．５％）出现椎基底动脉系统脑梗塞，ＭＲＩ在椎基底动脉系统ＴＩＡｓ脑梗塞的诊断方面是目前最为准确的方法，它可避免ＣＴ诊断“短暂性神经体征的脑梗塞（ＣＩＴＳ）”时出现的假阳性和假阴性结果。对于ＣＩＴＳ形成的原因，本组病例支持“缺血区脑组织侧支循环良好而未发生坏死”这种推测。当椎基底动脉系统ＴＩＡｓ病人短时间内相同症状频繁发作（＞３次／日）或每次发作时间＞１小时时，应高度怀疑腔隙性脑梗塞。cases of vertebrobasilar transient ischemic attacks were studied with MRI. It was found that 18 cases (26.5%)had vertebrobasilar infarction, MRI imaging, up to now, is the most accurate method in diagnosing infarction of vertebrobasilar territory, while CT diagnosis of cerebral infarction with transient signs(CITS), false positive and false negative results, For the pathogenesis of CITS, This paper supports the inference that the ischemic changes of cerebral parenchyma is an imcomplete necrosis due to the formation of abundant collateral ciculation, When the vertebrobasilar TIAs frequently recurs in a short time (more than three times a day)or each episode persists more than an hour,lacunar infarction should be highly suspected。

关 键 词：脑缺血 NMR 成像 

分 类 号：R743.310.2[医药卫生—神经病学与精神病学]